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    <title>ShellCheck: SC1144 – `external-sources` can only be enabled in .shellcheckrc, not in individual files.</title>
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    <h1>SC1144 – ShellCheck Wiki</h1>
    <a href="https://github.com/koalaman/shellcheck/wiki/SC1144">See this page on GitHub</a>
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    <h2
id="external-sources-can-only-be-enabled-in-shellcheckrc-not-in-individual-files"><code>external-sources</code>
can only be enabled in .shellcheckrc, not in individual files.</h2>
<h3 id="problematic-code">Problematic code:</h3>
<div class="sourceCode" id="cb1"><pre class="sourceCode sh"><code class="sourceCode bash"><span id="cb1-1"><a href="SC1144.html#cb1-1" aria-hidden="true" tabindex="-1"></a><span class="co"># shellcheck external-sources=true</span></span>
<span id="cb1-2"><a href="SC1144.html#cb1-2" aria-hidden="true" tabindex="-1"></a><span class="bu">source</span> /dev/zero</span></code></pre></div>
<h3 id="correct-code">Correct code:</h3>
<p>Add <code>external-sources=true</code> to
<code>.shellcheckrc</code></p>
<h3 id="rationale">Rationale:</h3>
<p>Due to its origins as an online tool, ShellCheck will by default run
in a sandbox where it only reads the files explicitly named on the
command line.</p>
<p>The <code>external-sources</code> <a href="directive.html">directive</a>
allows disabling this, but must be specified in
<code>.shellcheckrc</code>. This is because the sandbox would be useless
if the sandboxed script can disable it for itself.</p>
<h3 id="exceptions">Exceptions:</h3>
<p>None.</p>
<h3 id="related-resources">Related resources:</h3>
<ul>
<li>Help by adding links to BashFAQ, StackOverflow, man pages, POSIX,
etc!</li>
</ul>
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    <p style='font-size: 80%'><a href="../index.html">ShellCheck</a> is a static analysis tool for shell scripts. This page is part of its documentation.</p>
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